Question about 1992 Chevrolet Astro Extended

2 Answers

92 chev astro van heater won't heat

Heater cores been replaced systems been flushed thermostate been replaced yet I get just warm air from heater. heater valve is working. It was back flushed via a heater hose that connects to the intake and it belched a bunch of water when it was getting flushed and after that the heater worked great for one day and then went back to warm. Thought about an air block but wondering how to get it out. Tried everything pulling hose running pressure through the system nothing works except that one time. Thought maybe something is blocking in the block don't know.. got any ideas?

Paul Horner

Posted by on

  • abishai2 Dec 15, 2008

    yes it is global.

  • Anonymous Mar 14, 2009

    Having the same problem with my 97 Astro... But even if it was the thermostat stuck open wouldn't the van eventually get hot? Mine will eventually get slightly warm and the guage does not move.



2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Its your vacum valve behind the heater matrix  in the engine compartment LHS

Posted on Jun 23, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 599 Answers

Repeat backflush procedure to replicate fix.....use a radiator cleaner to clear blockages with all heater switches open so it circulates cleaner through heater plumbing as it global to all settings ..defrost/ main heat ..floor heat etc?

Posted on Dec 15, 2008

  • milespeed Dec 15, 2008

    ok...that you had heat one time tells us it will work proper with everything happy....assuming blockage as i suggested...assuming air blockage...usually driving will fix that after burping system best as possible.... so why doesnt it circulate?... can you squeeze upper radiator hose once engine warm w/o injury and tell if you have hot water circulating? same for heater hose in front of then behind heater valve ?



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Replace thermostat 03 explorer

Heater circuit of coolant system could be blocked by a trapped air bubble or a blockage in the heater core. Try having the heater core back flushed. Any good auto shop should be able to do this for you if you don't know how. To remove the trapped air bubble put a coolant flush valve in the heater core line that returns the flow to the water pump inlet. Connect a washing machine water hose to it then warm the car up, turn the heater temp control knob up to the max then open the flush valve on the heater return line to allow the air to be vented out--close the valve when the coolant flows out.(use caution he water blowing out of the hose will be hot. point it safely away into a bucket to catch the coolant) Check the thermostat for proper operation while you are at it so you know it is good. Put it in water on the stove and bring the water up to the thermostat set temp to see if it opens.

Dec 31, 2014 | 2003 Ford Explorer

1 Answer

How do i change 92 chev luminas heater core

It is probably not the heater core do to most times when the heater core goes bad it stars putting water into the interior of the car. It may be the heater core supply valve or the blend door actuator is not working. Try warming the Vehicle, then carefully feel the heater hoses, are they both hot? If one is cooler than the other, You need to flush the core, or do a replacement job on the heater core. Also if the system has a heat control valve on the heater hose, make sure it is working! Also check the thermostat, and the temperature blend door, thats under the dash, in the heater plenum. You can flush this yourself, buy the prestone flush kit and install the tee in the heater return line. Disconnect the heater hose at the waterpump, clamp the hose in back of the tee you installed and back flush till it runs clear.20 mins or so.

Sep 15, 2014 | 1992 Chevrolet Lumina

1 Answer

Not enough coolant getting to heater core

make sure when you put in fluid that you burp heater core might be air in it.

Jan 10, 2012 | 1995 Nissan Pathfinder

3 Answers

No heat , replaced radiator , water pump, rad. cap , hoses and flushed system twice.blows cool air.whats left?

Thermostat.? if you haven't? Do it first then try it. While the car is running for a while touch the heater hoses that lead to the firewall. if one is cold and one is hot? You have a blocked Heater core. Follow the hoses back to the engine. Unconnect them both. By using a garden hose flush out the heater core do one side and then reverse by doing the other hose Lots of junk will come out so be care ful. Mistake people make is "Flushing the system" That doesn't mean your flushing the heater core.
Seeing that you have done everything else it could be the thermostat which you didn't list or the heater core being clogged. When you finished installing the thermostat and flushing the heater core out. Replenish the coolant system . If you have a bleeder on the thermostat housing? use it . loosen it and top off the fluid until you see fluid comeout of the bleeder. The system being air bound would cause no heat..

Jan 10, 2011 | 2000 Buick LeSabre

2 Answers

We live in a cold climate. Our 1998 GMC Jimmy Heater will not provide cabin heat. The engine warms normally. We replaced the thermostat just to make sure the coolant was warm enough. The blower operates...


Dec 08, 2010 | 1998 GMC Jimmy

1 Answer


a stuck or broken thermostate would do that if the moter temp takes a really long time to warm up the thermostate is stuck open and needs to be replaced if the moter warms up to fast or over heats the thermostate is stuck shut and needs to be repalced. the heater core its self could be plugged and may be fixed by back flushing with water if you do it your self flushit seperate from the moter to prevent what ever may have plugged it from re-entering it.

Oct 14, 2010 | 2004 Ford Windstar

2 Answers

I have a 2000 Chevy Silverado pickup, and the heater will not blow hot air. I replaced the thermostat, and nothing changed. The radiator was flushed and filled in the last two months as well. I have all...

once truck is warm check both heater core hoses to make sure they are both warm if not then check the cold water valve could be stuck shut not allowing coolant to travel in to heater core.

Jan 05, 2010 | 2000 Chevrolet Silverado 1500

1 Answer

Heater not working (no heat)

If u have issues with heatting may be this will help.

1- If the carpet under the heater core is damp, or if antifreeze vapor or steam is coming through the vents, the heater core is leaking.Remove it and install a new unit (most radiator shops will not repair a leaking heater core.

1 - If the air coming out of the heater vents isn't hot, the problem could stem from any of the following causes:
  • The thermostat is stuck open, previnting the engine coolant from warming enough to carry heat to the heater core. Replace the thermostat.
  • There is a blockage in the system, Preventing the flow of coolant through heater core. Feel both heater hoses the firewall. They should be hot.if one of them is cold, there is an obstruction in one of the hoses or in the heater core,or the heater control valve is shut. Detach the hoses and back flush the heater core with a water hose. If the heater core is clear but circulation is impeded, remove the two hoses and flush them out with a water hose.
  • If flushing fails to remove the blockage from the heater core, the coremust replaced.

Nov 19, 2009 | 2003 Ford F250 Super Duty Crew Cab

3 Answers

I have a 2000 Jeep Cherokee and the heater does not heat

Check to see if the temp door is changing to heat,If that is fine,Then make sure the thermostat is good,maybe just replace it,and refill the radiator,and reservoir with coolant.The heater hoses going into the heater core need to be checked,while the engine is real hot,to make sure the heater hose going in the heater core,and out of the heater core are both to warm to hold by the naked hand.If only one of them is hot,and the other one is warm,to cold to the touch,then remove the heater hoses from the heater core,and use a water hose to flush the heater core out.Put the water hose in one side and flush the heater core out with the force of the water hose pressure.Then do the other heater core pipe the same way.Then replace the heater hoses back on the heater core,and refill the radiator.Make sure to get enough coolant back in the radiator.If there is not enough,the coolant will not flow threw the heater core and put out heat.I hope this is helpful,and you can do the work yourself.You may want to check those heater hose first thing.And change the thermostat anyway,sense you will have some coolant lose from flushing the heater core.If this helps,please let us know,thank you.

Oct 21, 2009 | 2000 Jeep Grand Cherokee

3 Answers

Heater just gets kinda warm but not hot

may need a thermostant,or a heatercore back flush.

Sep 30, 2009 | 1991 Ford Ranger Supercab

Not finding what you are looking for?
1992 Chevrolet Astro Extended Logo

369 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

78010 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides